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Finding the Fourth Proportional to 79,411.71, 109,580.09 and 47,579.79

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Solution

The fourth proportional to 79,411.71, 109,580.09 and 47,579.79 is: 65,655.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    79,411.71 : 109,580.09 = 47,579.79 : x
  2. Step 2: Convert to fraction form
    79,411.71/109,580.09 = 47,579.79/x
  3. Step 3: Cross multiply
    79,411.71x = 109,580.09 × 47,579.79
  4. Step 4: Simplify right side
    79,411.71x = 5,213,797,670.38
  5. Step 5: Solve for x
    x = 5,213,797,670.38/79,411.71
  6. Step 6: Final answer
    x = 65,655.28

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.